In source control, branching is analogous to a file system copy operation.

在源代码管理中，分支与文件系统复制操作类似。

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Firstly, this paper gives a strategy to implement control method of copy for data consistency of distributed multi-database system.

针对分布式多数据库系统的数据一致性，提出了一种复制控制法的实现策略。

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Traditional information security system can only safeguard information transmitting process, but can't control the decoded media data. So it can't prevent the illegal copy of the private.

信息安全技术中采取的密码学技术因仅能控制信息的传布入程，而对于解码后的媒体数据却难以控制，因而无法阻止合法使用者的非法拷贝和传布。

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